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    <title>Document</title>
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    <title>repeat方法</title>
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    <script type="text/javascript">
        //    repeat(): 返回新的字符串，表示将字符串重复指定次数返回
        console.log('say'.repeat(2));

        // padStart : 返回新的字符串，表示用参数字符串从头部(左侧)补全原字符串
        // padEnd ： 返回新的字符串，表示用参数字符串从尾部(右侧)补全原字符串

        console.log('h'.padStart(5,'o'));    // 'ooooh'
        console.log('h'.padEnd(5,'o'));   //  'hoooo'
        console.log('h'.padStart(5));   //  '    h'
    </script>
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